CODEWITHSUNDEEP
c++headerwav
user2366975
user2366975

Reputation: 4710

Decoding Wav Header

5249 4646 94e5 3703 5741 5645 666d 7420
1000 0000 0100 0200 44ac 0000 10b1 0200
0400 1000 6461 7461 70e5 3703 0000 0000

I have trouble decoding this header. I am trying this by hand according to https://ccrma.stanford.edu/courses/422/projects/WaveFormat/. I would expect some of those hexa's to be like: channels: 2, sampling rate: 44100, audio format: pcm...

What am I doing wrong?

RIFF

ChunkID         4   5249 4646       "RIFF"  
ChunkSize       4   94e5 3703       2498049795      
Format          4   5741 5645       "WAVE"


FMT

Subchunk1ID     4   666d 7420       "fmt "     
Subchunk1Size   4   1000 0000       268435456    
AudioFormat     2   0100            256       
NumChannels     2   0200            512    
SampleRate      4   44ac 0000       1152122880    
ByteRate        4   10b1 0200       280035840    
BlockAlign      2   0400            1024    
BitsPerSample   2   1000            4096


DATA

Subchuk2ID      4   6461 7461       "data"    
Subchunk2Size   4   70e5 3703       1894070019    
data

Upvotes: 3

Views: 352

Answers (1)

Remy Lebeau
Remy Lebeau

Reputation: 597941

You are not taking endian into account. The values are in little endian, but you are interpreting them as big endian instead.

The correct breakdown is as follows:

RIFF

ChunkID         4   52 49 46 46       "RIFF"  
ChunkSize       4   94 e5 37 03       53994900
Format          4   57 41 56 45       "WAVE"


FMT

Subchunk1ID     4   66 6d 74 20       "fmt "     
Subchunk1Size   4   10 00 00 00       16    
AudioFormat     2   01 00             1       
NumChannels     2   02 00             2    
SampleRate      4   44 ac 00 00       44100    
ByteRate        4   10 b1 02 00       176400    
BlockAlign      2   04 00             4    
BitsPerSample   2   10 00             16


DATA

Subchuk2ID      4   64 61 74 61       "data"    
Subchunk2Size   4   70 e5 37 03       53994864    
data

Upvotes: 2

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